man, I've been going nuts over at the TFW Boards on loose figures:
Alternators Camshaft - $10
Alternators Rollbar - $10
Classics Reissue Soundwave - $15
Cybertron Override GTS - $2
Cybertron Megatron - $15
Cybertron Crumplezone - $6
Cybertron Ransack GTS - $2
Cybertron Nemesis Breaker - $10
I'm doing by best to stock up on cheap, loose, figures. Around the time when a series ends, people ditch out. Give it a year, then everything kinda picks up a few $$$.